So this is something I originally mentioned in a list of other headcanons in a post that got lost during that whole christmas breakdown thing. Since this is the most interesting one (the only other one I recall is that I imagine pregnant dams float), I figure I’ll restate it. Why it took me nearly a year to do so is just because, y’know, eh I had other stuff to do.
So.
Fluffies love a few specific things. Sketties, hugs, babies, that kind of thing. But sometimes you can get a “Defective” fluffy, which is a rare … I suppose you’d call it glitch?.. That can happen in certain foals. Instead of the universally-accepted likes, a Defective fluffy will instead imprint on something else entirely. Airplanes, Sonic the Hedgehog, donuts, whatever.
For example, my Dr. Crazystein is a Defective, having imprinted on the concept of mad science. It’s all he seems to care about - he doesn’t really care about sketties or playing, babies have never crossed his mind, and he outright dislikes hugs.
Another example (though more weirdbox) is Sweet Tooth, who’s utterly obsessed with candy to the point that her insides have turned into sweets. Unless her sketties are topped with chocolate sauce and gummy worms, she’s going to reject them - and if they are, she’s eating only the toppings. It’s that bad.
Nobody really knows what causes this or how to control what a fluffy will imprint on. Sometimes a foal just ends up not acting quite right, you turn on Fluff-TV to see if fluffy shows help it adjust, and suddenly it declares its new life goal is to be a newscaster. It’s fully possible to get a Defective foal and try to imprint it on video games, only for it to fall in love with fire because Mario’s fireballs are cool and solve all problems.
Of course, not all fluffies that like non-sketti things are Defectives, either. Creep would prefer drugs to sketti but that’s not defectiveness, he’s just addicted after too much animal testing. Similarly, Sonic likes to play videogames because his owner encourages him and he’s naturally competitive - give him a plate of sketti and all focus is lost, that game will be paused or lost within seconds.
But if a fluffy shuns all the stuff fluffies normally love in favor of one specific thing and nothing else… Then yeah, you might have a Defective on your hands.